Gurry, Peter J. “How Your Greek NT Is Changing: A Simple Introduction to the Coherence-Based Genealogical Method (CBGM),” JETS 59, no. 4 (2016): 675-89.
This is a readable article on a new method in textual criticism, perhaps most notable for being employed in the General Epistles in the NA and UBS texts. Helpfully, he includes an index to discussions of variant readings in the General Epistles where CBGM played a role in the editor’s decisions.